Jee AdvancedD And F Block ElementsJEE Advanced 2014 Paper 1 OfflineINTEGER+3 / -02014Among PbS, CuS, HgS, MnS, Ag2S, NiS, CoS, Bi2S3 and SnS2 the total number of black coloured sulphides is Your AnswerCheck AnswerReveal AnswerClear AnswerShow Explanation